Lolium
Jahn, R. & Schönfelder, P. 1995: Exkursionsflora für KretaMeikle, R.D. 1985: Flora of Cyprus 2Strid, A. 2016: Atlas of the Aegean flora. – Englera 33 but modified and supplemented.
This key needs further testing especially as regards L. subulatum and L. rigidum resp.
| 1 | Florets turgid at maturity |
| 1' | Florets not turgid at maturity |
| 2 | Upper glume of the lateral spikelets much shorter than (about half as long as) the spikelet; florets oblong or oblong-lanceolate |
| 2' | Upper glume reaching to or exceeding the tip of the spikelet or at least more than half as long; florets elliptic to ovate |
| 3 | Perennial; leaf-blades folded about the midrib when young; lemmas awnless, muticous or blunt |
| 3' | Annual; leaf-blades rolled when young; lemmas awned from near the tip |
| 4 | Culms slender, with 1-2 nodes; lemma awned; awn 2-3 mm long |
| 4' | Culms rather robust and rigid, with 2-4 nodes; lemma without awn |
| 5 | Axis of the spike basis (0.5-)1-1.5(-2) mm thick; spikelets usually not closely appressed to the rhachis; glume not or only slightly callous; lemmas 4.5-8.5 mm long |
| 5' | Axis of the spike basis 1.5-3.5 mm thick; spikelets usually closely appressed to the rhachis; glume callous; lemmas 3.2-5.5(-7) mm long |
